Table 7.
Parameter estimates from multiple linear regression analyses for air trapping quantitative imaging measurements (n = 107)
| Variable | Comparison group or increase | Parameter estimate [95% confidence interval] (p-value)* | ||
|---|---|---|---|---|
| Change in E/I TLV ratio | Change in E/I MLD ratio | Change in LAA%-856 (%) | ||
| Intercept | 0.4 [0.3, 0.6] | 0.7 [0.7, 0.8] | − 10.6 [− 20.6, − 0.6] | |
| Deployer | Control |
− 0.01 [− 0.2, − 0.06] (p < 0.0001) |
− 0.05 [− 0.08, − 0.02] (p = 0.0008) | − 1.1 [− 4.4, 2.2] (p = 0.51) |
| Male | Female |
− 0.004 [− 0.05, 0.04] (p = 0.87) |
− 0.002 [− 0.03, 0.02] (p = 0.90) | − 3.0 [− 6.2, 0.3] (p = 0.07) |
| Age | + 1 year |
0.003 [0.001, 0.005] (p = 0.003) |
0.003 [0.002, 0.004] (p < 0.0001) |
0.1 [− 0.01, 0.3] (p = 0.07) |
| Smoking pack− years | + 1 pack− year |
− 0.0006 [− 0.002, 0.0008] (p = 0.39) |
− 0.0001 [− 0.0009, 0.0006] (p = 0.73) |
0.07 [− 0.01, 0.2] (p = 0.09) |
| BMI | + 1 kg/m2 |
− 0.002 [− 0.006, 0.0007] (p = 0.13) |
− 0.003 [− 0.005, − 0.0008] (p = 0.006) |
− 0.2 [− 0.4, 0.05] (p = 0.13) |
| TLV (expiratory) | + 1 L | – | – | 6.9 [4.7, 9.0] (p < 0.0001) |
Bold values are statistically significant
*Results are the p-value from the F-test using a linear model with all covariates included at the same time